Mass transfer to clean bubbles at low turbulent energy dissipation

Experimental gas–liquid mass transfer data from a system where single bubbles are kept stationary by a low turbulence downward liquid flow are compared with predictions from theoretical models which take turbulence into account. The data clearly show that, for the turbulence intensities at play, tur...

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Published in:Chemical engineering science 2006-02, Vol.61 (4), p.1334-1337
Main Authors: Alves, Sebastião S., Vasconcelos, Jorge M.T., Orvalho, Sandra P.
Format: Article
Language:English
Subjects:
Applied sciences
Bubble
Chemical engineering
Exact sciences and technology
Heat and mass transfer. Packings, plates
Higbie
Mass transfer
Turbulence
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description Experimental gas–liquid mass transfer data from a system where single bubbles are kept stationary by a low turbulence downward liquid flow are compared with predictions from theoretical models which take turbulence into account. The data clearly show that, for the turbulence intensities at play, turbulence does not affect mass transfer. Higbie's equation with contact time t e = d / u may be used for the calculation of the gas–liquid mass transfer coefficient of clean bubbles in systems with levels of turbulent kinetic energy dissipation of, at least, up to ε ∼ 0.04 m 2 s - 3 .
doi_str_mv 10.1016/j.ces.2005.08.001
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subjects Applied sciences
Bubble
Chemical engineering
Exact sciences and technology
Heat and mass transfer. Packings, plates
Higbie
Mass transfer
Turbulence
title Mass transfer to clean bubbles at low turbulent energy dissipation
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